all.cosmeticswholesale.comallcosmeticswholesale.com sell pigment samples. plus there are a few people on specktra that still do. i believe i once bought samples from a member called mac_mocha (or something like that! it was years ago!)
you could always place a want add in the clearance bin section of the forum for whatever samples you are after. i did that once and got lots of resultsnall
I wouldn't go with "the body needs." They have been mentioned numerous times for selling fake pigment samples. If you do a search for them on this site, you will find some threads about them.